使用PDO运行多个查询时，如何出现错误? [英] How can I get an error when running multiple queries with PDO?

问题描述

我正在使用PDO运行多个查询.如果第二个查询失败，则抛出Exception.

I'm running multiple queries using PDO. If the second query fails, now Exception is thrown.

$db = new PDO("mysql:host=localhost;dbname=test", 'root', '');
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$sql = "
DELETE FROM car; 
INSERT INTO car(name, type) SELECT name, from FROM vehicle;
";

try {
    $db->exec($sql);
}
catch (PDOException $e)
{
    echo $e->getMessage();
    die();
}

上面的代码执行时不会抛出异常.

The above code executes without throwing an exception.

如何确保所有查询都已成功运行?如何检查哪些查询失败?

How can I make sure that all queries have run successfully? How can I check which queries have failed?

P.S.我正在使用PDO多重查询来运行MySQL转储，但是任何有效的.sql文件都可以使用.

推荐答案

我在使用准备好的语句时找到了答案.遍历所有行集之后，我可以使用$stmt->errorInfo()检查执行的最后一个查询是否引起了错误.

I found the answer in using a prepared statement. After looping through all rowsets, I can check if the last query executed caused an error using $stmt->errorInfo().

$db = new PDO("mysql:host=localhost;dbname=test", 'root', '');
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_SILENT);
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, 1);

$sql = "
DELETE FROM car; 
INSERT INTO car(name, type) SELECT name, from FROM vehicle;
";

$stmt = $db->prepare($sql);
$stmt->execute();
$i = 0;

do {
  $i++;
} while ($stmt->nextRowset());

$error = $stmt->errorInfo();
if ($error[0] != "00000") {
  echo "Query $i failed: " . $error[2];
  die();
}

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